51 lines
1.5 KiB
JavaScript
51 lines
1.5 KiB
JavaScript
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import { flatten } from '../../utils/array.js';
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import { factory } from '../../utils/factory.js';
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var name = 'setUnion';
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var dependencies = ['typed', 'size', 'concat', 'subset', 'setIntersect', 'setSymDifference', 'Index'];
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export var createSetUnion = /* #__PURE__ */factory(name, dependencies, _ref => {
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var {
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typed,
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size,
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concat,
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subset,
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setIntersect,
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setSymDifference,
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Index
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} = _ref;
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/**
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* Create the union of two (multi)sets.
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* Multi-dimension arrays will be converted to single-dimension arrays before the operation.
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*
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* Syntax:
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*
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* math.setUnion(set1, set2)
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*
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* Examples:
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*
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* math.setUnion([1, 2, 3, 4], [3, 4, 5, 6]) // returns [1, 2, 3, 4, 5, 6]
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* math.setUnion([[1, 2], [3, 4]], [[3, 4], [5, 6]]) // returns [1, 2, 3, 4, 5, 6]
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*
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* See also:
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*
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* setIntersect, setDifference
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*
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* @param {Array | Matrix} a1 A (multi)set
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* @param {Array | Matrix} a2 A (multi)set
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* @return {Array | Matrix} The union of two (multi)sets
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*/
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return typed(name, {
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'Array | Matrix, Array | Matrix': function ArrayMatrixArrayMatrix(a1, a2) {
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if (subset(size(a1), new Index(0)) === 0) {
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// if any of them is empty, return the other one
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return flatten(a2);
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} else if (subset(size(a2), new Index(0)) === 0) {
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return flatten(a1);
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}
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var b1 = flatten(a1);
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var b2 = flatten(a2);
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return concat(setSymDifference(b1, b2), setIntersect(b1, b2));
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}
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});
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});
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